package com.ccll.utils;

import lombok.extern.slf4j.Slf4j;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;

/**
 * @author Seon
 * @date 2022/9/22 11:21
 */
@Slf4j
@Component
public class IPUtil {
    public String getIp(HttpServletRequest request) {
        String ipAddress = null;
        try {
            ipAddress = request.getHeader("x-forwarded-for");
            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getHeader("Proxy-Client-IP");
            }
            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getHeader("WL-Proxy-Client-IP");
            }
            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getRemoteAddr();
                if (ipAddress.equals("127.0.0.1")) {
                    // 根据网卡取本机配置的IP
                    InetAddress inet = null;
                    try {
                        inet = InetAddress.getLocalHost();
                    } catch (UnknownHostException e) {
                        e.printStackTrace();
                    }
                    ipAddress = inet.getHostAddress();
                }
            }

            // 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
            if (ipAddress != null && ipAddress.length() > 15) { // "***.***.***.***".length()
                // = 15
                if (ipAddress.indexOf(",") > 0) {
                    ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
                }
            }
        } catch (Exception e) {
            ipAddress = "";
        }
        // ipAddress = this.getRequest().getRemoteAddr();

        return ipAddress;
    }

    /**
     * 发送请求来获取ip地址的位置
     *
     * @param url
     * @param ip
     * @return
     */
    public String getIpAddress(String url, String ip) {
        OkHttpClient client = new OkHttpClient();
        Request request = new Request.Builder().url(url + "?ip=" + ip).build();
        try {
            Response response = client.newCall(request).execute();
            String result = response.body().string();
            return result;
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
}
